|Other 2-axle, 4-tire vehiclesb||999,754||1,467,664||1,876,690||1,926,597|
a All domestic operations of U.S. carriers other than those operating under 14 CFR 121 and 14 CFR 135. b Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars. c Includes municipally owned transit and commercial, federal, and school buses. d Includes light and heavy rail only. e Fiscal year data. Amtrak began operations in 1971. f Includes demand response, ferryboat, and other transit not specified.
Key: R = revised, U = unavailable, P = preliminary.
Notes: Highway and air data are revised for 2006. Rail (except Intercity/Amtrak) and other transit data are preliminary for 2007. 2007 data for buses and other are not comparable to earlier years due to change in the method of data collection and estimation by the American Public Transportation Association (APTA).
Sources: Air Carrier-Bureau of Transportation Statistics, General Aviation-Eno Transportation Foundation, Highway-Federal Highway Administration, Class I and Intercity Rail-Association of American Railroads, Transit and Commuter Rail-American Public Transportation Association as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-37, available at http://www.bts.gov as of October 2009.